Merge pull request #75999 from clayjohn/Particles-angle-rand

Use angle_rand to calculate base_angle in particles process material

scene/2d/cpu_particles_2d.cpp

@@ -722,12 +722,12 @@ void CPUParticles2D::_particles_process(double p_delta) {
 				tex_linear_velocity = curve_parameters[PARAM_INITIAL_LINEAR_VELOCITY]->sample(0);
 			}*/
 
-			real_t tex_angle = 0.0;
+			real_t tex_angle = 1.0;
 			if (curve_parameters[PARAM_ANGLE].is_valid()) {
 				tex_angle = curve_parameters[PARAM_ANGLE]->sample(tv);
 			}
 
-			real_t tex_anim_offset = 0.0;
+			real_t tex_anim_offset = 1.0;
 			if (curve_parameters[PARAM_ANGLE].is_valid()) {
 				tex_anim_offset = curve_parameters[PARAM_ANGLE]->sample(tv);
 			}

scene/3d/cpu_particles_3d.cpp

@@ -742,12 +742,12 @@ void CPUParticles3D::_particles_process(double p_delta) {
 				tex_linear_velocity = curve_parameters[PARAM_INITIAL_LINEAR_VELOCITY]->sample(0);
 			}*/
 
-			real_t tex_angle = 0.0;
+			real_t tex_angle = 1.0;
 			if (curve_parameters[PARAM_ANGLE].is_valid()) {
 				tex_angle = curve_parameters[PARAM_ANGLE]->sample(tv);
 			}
 
-			real_t tex_anim_offset = 0.0;
+			real_t tex_anim_offset = 1.0;
 			if (curve_parameters[PARAM_ANGLE].is_valid()) {
 				tex_anim_offset = curve_parameters[PARAM_ANGLE]->sample(tv);
 			}

scene/resources/particle_process_material.cpp

@@ -419,7 +419,7 @@ void ParticleProcessMaterial::_update_shader() {
 	if (tex_parameters[PARAM_ANGLE].is_valid()) {
 		code += "	float tex_angle = textureLod(angle_texture, vec2(0.0, 0.0), 0.0).r;\n";
 	} else {
-		code += "	float tex_angle = 0.0;\n";
+		code += "	float tex_angle = 1.0;\n";
 	}
 
 	if (tex_parameters[PARAM_ANIM_OFFSET].is_valid()) {
@@ -737,7 +737,7 @@ void ParticleProcessMaterial::_update_shader() {
 	code += "			VELOCITY = normalize(VELOCITY) * v;\n";
 	code += "		}\n";
 	code += "	}\n";
-	code += "	float base_angle = (tex_angle) * mix(initial_angle_min, initial_angle_max, rand_from_seed(alt_seed));\n";
+	code += "	float base_angle = (tex_angle) * mix(initial_angle_min, initial_angle_max, angle_rand);\n";
 	code += "	base_angle += CUSTOM.y * LIFETIME * (tex_angular_velocity) * mix(angular_velocity_min,angular_velocity_max, rand_from_seed(alt_seed));\n";
 	code += "	CUSTOM.x = base_angle * degree_to_rad;\n"; // angle
 	code += "	CUSTOM.z = (tex_anim_offset) * mix(anim_offset_min, anim_offset_max, rand_from_seed(alt_seed)) + tv * tex_anim_speed * mix(anim_speed_min, anim_speed_max, rand_from_seed(alt_seed));\n"; // angle